/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.security.modules;

import org.apache.flink.runtime.security.SecurityConfiguration;

/**
 * A factory for a {@link SecurityModule}. A factory can determine whether a {@link SecurityModule}
 * works in the given environment (for example, it can check whether Hadoop dependencies are
 * available) and can then create (or not) a module based on that.
 */
@FunctionalInterface
public interface SecurityModuleFactory {

	/**
	 * Creates and returns a {@link SecurityModule}. This can return {@code null} if the type
	 * of {@link SecurityModule} that this factory can create does not work in the current
	 * environment.
	 */
	SecurityModule createModule(SecurityConfiguration securityConfig);
}
